Переведите предложения, обращая внимание на конверсию. 1 2 of the most important building* materials appeared in 19th century. 2 the Greeks* sometimes used iron bars to strengthen the building. 3 he designs* buildings. 4 new structures* are the result of the use of new materials and construction methods. 5 the plan* shows what materials the developer should use. 6 they plan* the construction process. 7 concrete* is very versatile. 8 builders had to concret* the pits. 9 he described the new concrete* blocks. 10 each building is functioning* for a long time. 11 This material has several functions*. 12 heat flows* to a colder area. 13 the flow* continues until the external and internal temperatures are equal. 14 he must know the subject* of project procedures. 15 if the concrete is subjected* to tensile stress, it must be reinforced with steel.

1 2 самых важных строительных материалов * появились в

19-го века.

2 Греки * иногда использовали железные решетки для укрепления здания.

3 он проектирует * здания.

4 новые конструкции * являются результатом использования новых материалов и методов строительства.

5 план * показывает, какие материалы должен использовать разработчик.

6 они планируют * процесс строительства.

7 бетон * очень универсален.

8 строителей должны были бетонировать * ямы.

9 он описал новые бетонные * блоки.

10 каждое здание функционирует * в течение длительного времени.

11 Этот материал имеет несколько функций *.

12 тепловых потоков * в более холодную зону.

13 поток * продолжается до тех пор, пока внешняя и внутренняя температуры не станут равными.

14 он должен знать предмет * проектных процедур.

15 если бетон подвергается * растягивающему напряжению, он должен быть усилен

со сталью.

Объяснение:

1.this girl's pen 2. his sister's friend; 3 my brother's dress; 4. your father's house; 5 her son's wife; 6 the boy's ball.
67) 1. there is; 2. it is; 3 there is ; 4 it is; 5 it is; 6 it is ; there is; 7 there is; 8 it is; there is; 9 it is; there is; 10 it is.
68) 1 there are; 2 there is; 3 there are; 4 there are; 5 there is; 6 there are; 7 there are; 8 there is; 9 there are; 10 there is; 11 there are; 12 there is; 13 there are; 14 are there;
69) 1 There are six desks in your classroom.
2. Yes, there is.
3. The blackboard is in our classroom.
4. In our classroom there are three windows.
5. Yes, there are some.
6. The pictures are on the walls.

Out duties at home.

As I have a big flat I think my duty is to help my parentswith housekeeping.Usually girls heip their mother and boys help their fathers. I think we all should help our parents. It`s our first duty.

We have three rooms in our flat: a living room, a kitchen,a bathroom and two bedrooms. Our kitchen is rather big. Our rooms are light and clean.

My parents are very busy.I help my mother to clean dust rooms.My father help us too.He cooked dinner when my mother was busy.We clean our flat every Saturday.

I want to have a very clean room because it`s very pleasant to live in tidy, comfortable place.